Whip-stitch sewing-machine.



No. 832,740. PATENTED OCT- 9, 1906.

K. MAIBR. WHIP STITCH SEWING MACHINE.

APPLICATION FILED JAN. 18, 1905.

s'snnnrs-snnnw 1.

No. 832,740. PATENTED OCT. 9, 1906.

K. MAIBR.

WHIP STITCH SEWING MACHINE. APPLIOATION FILED ulna, 1905.

3 SHEETS-SHEBT Z,

3 SHEETS-SHBET 3.

PATENTED OUT. 9, 1906.

K. MAIER. WHIP STITCH SEWING MACHINE.

APPLICATION FILED IAN. 1B, 1905.

- KARL MAIER, or STUTTGART, GERMANY, :ASSIGNOR TO UNION sPEciAni To @ZZZULOTI'U it may concern.-

' chines ofthe type wherein the needle-loop is V UNITE STATESPATENT oFFIoE."

MASCHINENFABRTK 'e sELLsoHAFr MIn-BESOH ANKTER .HAFTUNG,

OF STUTTGART,GERMANY.

' WHlP- ST1TOH SEWING-MACHINE.-

Be it known that I, KARL MAIER, a citizen of the German Empire, residing at Stuttgart, in the Kingdom of VViirtemberg, Germany, have invented certain new and useful ImprovementsinWhip-StitchSewing-Machines,

' of which the following is a description, reference being had to' the accompanying drawings and to the figures of reference marked thereon.

My invention relates to overseaming-mapassed through .the material ad'acentthe edge thereof and a looper-threa is passed through said needle-loop, which is in turn either directly or indirectly engaged with the needle-loop uponthe upper surface of the work by a spreader.

- leave the needle-loop rapidly, while the same My invention consists in novel mechanism for supporting and operating the looper, whereby the same is caused to enter and when out of theloop moves more slowly.

f By this rapid movement of the looper entering and leaving the needle-loo a relatively small loop of needle-thread is formed on the under side of the material, thusavoiding the reeving of the needle-thread through the fabric, and a much cheaper quality of thread may be used-such as twisted cotton, jute, yarn, and the like-and abroad hem covering over the edge of the material may be made;

My invention consists,-further, in details of construction and combinations of parts which will be hereinafter described, pointed'out in the claims' v In the drawings, Figure 1 is a side elevaand i tion of a machine embodying my invention,

. certain parts being omitted for the sake of 4c clearness. Fig. 2 is a top plan view of an overseam made on my machine. Fig. 3 is a bottom plan view of the overseam shown in Fig. 2. Fig. 4 is a top plan view of an overseam made on my machine when the spreader is a thread carrying m'ember, the overseam in this instance being composed of three threads. Fig. 5 is a bottom plan view of the overseam shown in Fig. 4. Fig. 6fis aside view of the spreader, together with the imme-'- diate mechanism for supporting and operatting the same. Some of the parts a pear in perspective, 'as the axis of the sprea er is inclined to the horizontal. Fig. 7 is an end Q view of the parts shown in Fig.6. Fig.8 is a Specification of Letters Patent. I I Application filed January 18. 1905. Serial No. 241,697

I side elevatio'n of the looper and the immedi parts shown-in Fig. 8,. F g.v 10 shows in perspective. the relative arrangement of the neeis presenting the looper-loop to the needle. Fig. 13 is a modification wherein the spreader is a thread-carrying im lement,- which.in its movements enters the. oolper-loop and presents its thread to the need e; and Fig. 14 is a "section through the fabric, showing the position of the needle-thread loops. in the finished overseam relative to the fabric.

The machine-frame 1 is of theusual form, carrying bearings at its forward end, in which reciprocates the needle-bar carrying. a needle usual ated by the usual belt wheel3, The needle shown in Fig. 10. i

The thread-carrying looper. 4 moves. j beto the looper. Extending-upwardly from brackets carrying atth'eir upper en s bear- Loosely mounted on the shaft 63 are two arms 13 13, arranged, respectively, 1 adjacent the ate mechanismflfor supportin and opei'atingthe same. Fig. 9 isa to p an view of thedle, looper, and spreader, together with the .neath the needle-plate 5jand closelybehind the needle 2. Sa1dlooper'4is carried by. a

ported in a bearin 43 on the machine-bed.

. 95 y connected to .said shaft, so that latented 95 1306.,

the needle and spreader,wherein the spreader 2.. .The needle-bar is. reciprocated, by the 'ooseneck-lever 22, pivoted, on the machineirameand operativelyconnected to an eccentric carried by the main shaft and oper in its 0 eration assesthrou h the fabric ad jacentt eedget ereof and,r1sing, throws out a 10op for the looper to ;enter,.-as clearly.

the'bd of "the maehineare two. se arated J I do rings for a shaft 60. Mounted on said shaft 60 is a sleeve'61, carrying two arms 62 62, .carrying in turn; another shaft .-;or bearing 63;- V

. ,io5 arms 62 62." Between thearms 13.13-and'. i loosely connected tethe shaft 63 is a'link 12.- The-oppositeends-of the. arms 13 13 embrace I the end of the arm 14 and are pivotally connec'ted thereto.. It will be noted that the arms 62 62 and the arms 13 13 constitute a system-of to gle-levers. It will also be noted that the pat of movement of the free end of the arm .14 is substantially in a verticai line containing the shaft 60. The toggle-levers moving from a position on one side of the vertical line or lon itudinal axis of the tog gles to a correspon ing position on the other side will move the looper 4 forward and back, making a complete reciprocation of said looper, and the toggles in moving back topoi the looper.

sition shown in Fig. 8 will again reci rocate Thus it will be seen t at the looper has two complete reciprocations to .--one reciprocation of the tog le-lever. The

link 12 is in turn pivoted to a ell-crank lever 11, fulcrumed on the machine-frame, and at its other end connected by a link 10 to aneccentric 8. .Said' eccentric is carried by a gear-wheel 9,.freely supported on a stud 90, secured to the main frame of the machine. The proportions of the gear-wheels are such that the gear-wheel 9 revolves once while the gear-wheel 91. revolves twice. In other words, the. gear-wheel 9 has a one-to-two movement. Itwill be noted that the timing of the vertical movement of the link 10 will be the same as the vertical component of movement-of the ecceritricB-that is, there is first a relative slow movement from the extreme upper position, increasin to a maxi.

mum at ninety degrees, then ecreasing to zero at its lowest point atone hundred and eighty degrees, increasing again to two hundred and seventy degrees, &c.

From the above statements it will be seen that'the looper is repipro ated twice to .each revolution of the eccent 'c 8, also that the looper is in.its withdrawn position (see Fig. 1) when the eccentric is at its hi hest point, and as the eccentricmoves to it s lowest posi- .tion the looper 'is' moved forward into the thrown out, and thus avoids much of the reeving of the thread through the material, and a poor quality of thread can be used.

Thes reader 16 (shown in detail in Figs-6 and 7) as a forked thread-engaging end. This spreader 16 is pivotally mounted intermediate its ends on a link 17, which in turn is pivoted on a stud 170, carriedby a standard 19.. Said standard is formed integral with the base 19' and projects upwardly toward V the operatorQ The stud 170, which is at right angles to the standard 19, thus. inclined to the bedplate, and consequently the spreader swingin on-the link 17 moves 1n a plane cutting the orizontal plane containing the worksupport at an acute angle. The s reader is given its movementsjabout the lin 17 by a rock-shaft 20, which is pivoted between the standards 19 and 190. The arm'18 of the rock-shaft is forked and pivotally connected to the spreader, while the other arm of the rock-shaft is connected b the link 21 to the arm 22 of the needle-vi rating arm. The support for the spreader is so disposed rela tive to the'needle 2 that the spreader moves from a position behind the needle beneath the bed-plate, up over the edge of the mate rial, to a position infront of the needle, the

spreader in its movement engaging the.

looper-loop 15 and carrying. the same into po- 'sition to be enga ed by the needle. The resulting seam is t at shown in Figs. 2 and 3. If, however, the spreader be a thread-carrying implement, as, shown in Fig. 13, said s reader, with its -thread 23, would pass tlirough the looper-loop 1.5 and deposlt a loop of the spreader-thread in a position to be'entered by the needle, and the resulting seam would be that shown in Figs. 4 and 5. Various minor modifications and changes in the construction and arrangement of the parts may be made without departing from thespirit of my invention, and it will be understood that as far as the broad features are concerned I do not wish to be limited to the details of construction. I

. Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is I 1. In an overseaming-machine, the combi nation with a needle and means for operating the same, of complemental stitch-forming mechanism, comprising a looper and means for operating the said looper including togglelevers, said toggle-levers moving across the.

longitudinal axis of said toggles, whereby the looper is given two complete reciprocations to one reciprocation of the toggles; substantially as described.

2. In an overseaming-machine, the combination with a needle and means for operating the same, of complemental stitch-forming mechanism, comprising a spreader, means for operating the said spreader, a looper, and means for operating the said looper, including toggle-levers, said toggle-levers moving across the longitudinal axis of said toggles;

whereby the looper is given two complete reciprocations to one reciprocation of the toggles; substantially as described.

3. In an oversea'ming-machine, the combination with a needle, and means for operating the same, of complemental stitch-forming mechanism, comprising a spreader, a support for said spreader, said support bein inclined to the bedlate whereby the sprea er moves. from a position behind the needle below said "to see toggle-levers moving across thclondudinal ax s of said toggles, whereby'the ooperis given two complete reci rocations to one recipmcation of the togg described. o

4. In a sewin -machine, the combination of the main shaft, a needle, means for operating the same and complemental stitchforming mechanism com rising a looper, and

means foroperating sai looper including a rotating member, means for rotating said member once to two'rotations of the main shaft, a memberreciprocated by said rotating member, and means connecting said looper and reciprocating member, said connectin means reciprocating said looper twice reciprocatioh of the reci rocating member; substantially as describedl 5; In an overseamin' 'machine, the combination of the main sha t, a needle, mean.s' for operating the same and con'iplemental stitchforming mechanism, comprising a spreader, means for operating said spreader, a loo er,

and means for operating said looper incln ing a rotating member,- means for rotating said member once to two rotations of the main shaft, a memberreciprocated by said rotat ing member, and lrneans connecting said lo'oper and reciprocating member, said connecting means reciprocating said loo per twice to eac reciprocation of the'reciprocating mernber; substantially described.

' 6. In an oversea-ming-machine, the combination of the main shaft, a needle, means for operating thesainc and complements! stitch forming mechanism comprising a looper, and meansfor operating said looper including a rotating member, means for rotating said. member once to two rotations of the main I shaft, an eccentric portion carried by said roating member, and means connecting said eccentric portion and said looper, whereby said loo or is reciprocated twice to each rowhereby sai each rotation tation c said eccentric portion; substantially as described. p y

'7. In an orerseannn -machinc, the combs nation of the main shalt, a needle, means for operating the saline and complement-cl stitchforming mechanism, comprising a spreader, means for o crating said spreader, a looser, and means 'or operating said looper includ ing a rotating member, means for rotating said member once to two rotations of the portion carried by sald rotating member, and means connecting said eccentric portion, and said looper, iooper is reciprocated twice to of said eccentric portion; 'sub stantiallyas described. l

8. In an overseaming rn achine, the combi nation of the main shaft a needle, means for es; substantially as other end of said levers being connected to a fixed support, a fixed support, a rotating part, means for rotatin said part once to two rotations of'the main shaft, andmeans connecting said rotating part and said tog gles, whereby said looper 1s reciprocated twice to one rotation oi said rotating part; substantially as described,

9. In anoverseamin -m achine, the 'combi nation of the main sha' t, a needle, mea s for operating the same, and complemental stitch forming mechanism, comprising a spreader, means for operating said spreader, a looper, toggle-levers, one endof said toggle-levers being operativoly connected to said looper, an the other end of said levers being connected to a fixed support, a fined so ort, a rotating part, means for rotatingsai part once to two rotations of the main shaft, and means connecting said rotating part and said toggles, whereby said looper 1s reciprocated twice to one rotation of said 1'otating part; substantially as described.

10. In an overseaIning-inachine, the combination of the main shaft, a needle, means for operating the same and complements-l stitcl1-foflning mechanism, comprising a looper, a rock-shaft on which said looper is supported, toggle-levers, one end of said toggledever being connected to said. rock-shaft and the other end of said levers being connected to a fixed support, a fixed support,'a rotating part, means for rotating said part once to two rotations of the main shaft, and means connecting said rotating part, and said toggles, whereby said loopcr is recipro cated twice to one rotation of said rotating part; substantially as described.

11. In an overseaming-machine, the combination of the main shaft, a needle, means for operating the same, and complemental stitchformin mechanism, comprising a looper, toggle evers, one end of said toggleleyers being operatively connected to said looper and. the other end of said levers being connected to a fined sup ort, a fixed support, a rotating part, means or rotating said t once to two rotations of the main shat aneccentric carried by said rotating art, a bellcranlr lever, a link connecting said eccentric and said bell-crank lever, a link cdannecting said bell-crank lever and said. toggle-levers; substantially as described. p

In testimony whereof I afiix my signature in presence of two witnesses. 1 I KARL MAIER.

'Witnesses-zrEMIL Ennsr" .Eii'rnnnann, 

